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Do not CASCADE-delete vouchers when deleting items or quotas

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This commit is contained in:
Raphael Michel
2019-07-11 12:33:42 +02:00
parent f066ed01ff
commit d994fc674a
6 changed files with 66 additions and 20 deletions
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17
src/pretix/base/models/vouchers.py
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@@ -142,22 +142,26 @@ class Voucher(LoggedModel):
item = models.ForeignKey(
Item, related_name='vouchers',
verbose_name=_("Product"),
null=True, blank=True, on_delete=models.CASCADE,
null=True, blank=True,
on_delete=models.PROTECT, # We use a fake version of SET_NULL in Item.delete()
help_text=_(
"This product is added to the user's cart if the voucher is redeemed."
)
)
variation = models.ForeignKey(
ItemVariation, related_name='vouchers',
null=True, blank=True, on_delete=models.CASCADE,
null=True, blank=True,
on_delete=models.PROTECT, # We use a fake version of SET_NULL in ItemVariation.delete() to avoid the semantic change
# that would happen if we just set variation to None
verbose_name=_("Product variation"),
help_text=_(
"This variation of the product select above is being used."
)
)
quota = models.ForeignKey(
Quota, related_name='quota',
null=True, blank=True, on_delete=models.CASCADE,
Quota, related_name='vouchers',
null=True, blank=True,
on_delete=models.PROTECT, # We use a fake version of SET_NULL in Quota.delete()
verbose_name=_("Quota"),
help_text=_(
"If enabled, the voucher is valid for any product affected by this quota."
@@ -408,4 +412,7 @@ class Voucher(LoggedModel):
kwargs['subevent'] = self.subevent
if self.quota_id:
return SeatCategoryMapping.objects.filter(product__quotas__pk=self.quota_id, **kwargs).exists()
return self.item.seat_category_mappings.filter(**kwargs).exists()
elif self.item_id:
return self.item.seat_category_mappings.filter(**kwargs).exists()
else:
return False